Improvement in stone-planing machines



3 Sheets-Sheet 1.

J. HAMILTON & P. PRASI. Stone-Planing Machines.

No. 196,087. Patented 061.16,!877.

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M11 EESEH 3 Sheets-Sheet 2. J. HAMILTON & P. FRASI. Stone-PlaningMachines.

No. 196,087. Patented Oct. 16,1877.

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F: 3 Sheets-Sheet 3. 'J. HAMILTON & F. FRASI. Stone-Planing Machines.

No. 196,087. Patented Oct. 16,1877.

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PATENT QFFIGE.

JOSEPH HABHLTON, OF BATTERSEA, AND FREDERICK FRASI, 0F WOOLWIOH,ENGLAND.

IMPROVEMENT IN STONE-PLANING MACHINES.

Specification forming part of Letters Patent No. 196,087, dated October16, 1877; application filed May 16, 1877 patented in England, J une 7,1876, for fourteen years.

To all whom it may concern:

Be it known that we, JOSEPH HAMILTON, of Falcon Road, Battersea,England, and FREDERICK FRASI, of Brewer street, Woolwich, England, haveinvented an Improved Stone-Working Machine and tools therefor; and dohereby declare that the following description, taken in connection withthe accompanying drawings hereinafter referred to, forms a full andexact specification of the same, wherein we have set forth the natureand principles of our said improvement, by which our invention may bedistinguished from others of a similar class, together with such partsas we claim and desire to secure by Letters Patent that is to say:

Our invention relates to machinery for planing stone to a fiat or moldedface, and to the tools employed for that purpose.

We mount on a flaming a table, on which the stone is fixed, and we givethe table a toand-fro movement, as in a planing-machine. We also makethe table capable of adjustment laterally to various degrees ofinclination, so

that .the stone can, have its edge or face inclined according to thepattern of the molding to be cut on it. At one side of the table wemount a rest, carrying a set of tool-holders, which rest can be slid toand fro transversely to the movement of the table; or there may beseveral of such tool-holders, which can be so moved independently of oneanother.

The tools which we employ consist of pieces of bar-steel, of atrapezoidal sectionthat is to say, the one edge of the bar is somewhatwider than the other edge.

The construction of the said machine will be readily understood onreference to the accompanying drawings, in which- Figure 1 shows a frontelevation, Fig. 2 an end elevation, and Fig. 3 a plan, of the machine.

On the framing A is a sliding table, B, carrying the stone block, 0, tobe molded, and made to travel backward and forward bymeans of thescrew-spindle D, rotated by gearing E and driving-pulleys F F. The stone0 is clamped, by a screw-bolt and plate at 0 onto a slab, B, which ishinged to the table at B and is supported at its back by raising andlowering screws B by which the slab and stone can be adjusted to anyrequired angle to enable the face 0 of the stone to be presented in themost convenient position to the several sets of cutting-tools H H H Forsome classes of work the hinging of the table may be dis pensed with.The tools H H H are mounted in front of the stone in tool-holders I I P,a number of the tools corresponding to the height of the face of thestone, being arranged one above the other, each tool-holder withpackingpieces between them, as shown more clearly in the enlarged viewat Fig. 7, so that a small space intervenes between each two cutters.They are secured by the pinching-screws K.

The tools H are shown to an enlarged scale in back view, plan, andcrosssection, respectively, at Figs. 4, 5, and 6. They are made ofbarrsteel, tapering in thickness from the front face h, furnishing thecutting-edge to the back face h. For some kinds of work these tools maybe made with a beak, as shown at Fig. 3. Each tool-holder I contains twosets or piles of such tools, the second set being arranged with theircutting-edges in line with the space between the tools of the first set,so as to operate upon the portions of the stone that are not acted on bythese. The cutting-edges of the two sets H are somewhat in advance ofthose of the two sets H, and the sets H are in advance of H so that onthe stone being made to travel in the direction of the arrow, Fig. 3,each two sets will be made to cut the face of the stone already acted onby the preceding two sets.

The tool-holders are mounted 011 a table, L, which can be set forward onthe framing A by means of screw-spindles M and gearing N, so as to bringthe cutting-edges of the tools forward to make a fresh cut on the faceof the stone after this has been passed in the direction of the arrowunder the action of all the cutters, and is brought back by the reversedmotion of the screw D, in order to be again submitted to their action.

In commencing operations with the machine, the cutting-edges of eachpile of tools are set to a templet, so as to correspond to theconfiguration of the molding to be cut, as indicated at Fig. 2, afterwhich they are clamped securely in position by the screws K.

In a slot, 0 of the rest 0, carried by the table L, is fixed a scraper,I, having the configuration of the molding, and serving to finish thesurface of the stone at'terit has been operated upon by the cutters H.The rest 0 can be turned in its socket 0 and adjusted by the screw 0 soas to cause the scraper to act at any desired angle on the stone. Theforward motion of the table A is effected at a slow speed by the pulleyF, while the back motion is ef' fected at a quicker speed by the pulleyI", having a crossed strap.

Although we have shown in the drawings and described a constructionot'machine wherein the table has a to-and-fro motion past the tools,which are relatively stationary, it is obvious that the relativemovement might be inverted by keeping stationary the table carrying thestone, and moving past it a table or framing carrying the cutting-tools.

Having thus described the nature of our invention, and in what mannerthe same is to be performed, we claim 1. A machine for working stone,wherein a sliding table adapted to be inclined to any desired angle forcarrying the stone to be operated upon is made to travel past one ormore piles of cutting-tools, carried in toolholders that can be adjustedin position to and from the face of the stone, the tools being capableof adjustment in their holders, so as to conform with theircutting-edges to the configuration of the surface to be produced,substantially as herein described.

2. In stone-working machinery, such as is above referred to, the slab ortable, constructed substantially as specified, for carryin g the stone,so that it can be adjusted to various degrees of inclination relative tothe cutters, substantially as and for the purpose herein described.

3. In stone-working machinery, with a sliding table adapted to beinclined at any angle, the several sets of cutters, arranged so that thecutting-edges of one set project somewhat beyond those of the precedingset, substantially as and for the purpose herein described.

4. The tool-holder I, provided with a series of tools, H, arrangedsubstantially as specified, and capable of separate adjustment, as andfor the PIU'POSC specified.

5. A machine for working stone, wherein a sliding table, adapted to beinclined to any desired angle, for ca-rryin g the stone to be operatedupon, is made to travel past one or more piles of cutting-tools, carriedin tool-holders that can be adjusted in position to and from the face ofthe stone, substantially as specified.

In testimony whereof We have signed our names to this specification inthe presence of two subscribing witnesses this 21st day of April, 1877.

JOSEPH HAMILTON. FREDERICK FRASI.

VVitnessen:

CnAs. D. ABEL, Jun. 1. M. MILLARD.

